her say, hi, mom. >> trisha was very kind hearted, very smart. >> as a child, says father gary, trisha lit up the room. >> she would sometimes just bound into the room, you know, spread her arms apart, say, ta-da, you know, that type of thing. >> donna and gary brought trisha here to marian, indiana, to attend this small christian college. one spring evening, in 1993, trisha left her dorm room for a walk. on march 29th, around 8:00 at night, trisha riteler came here, to this shopping center. she bought a soda and a magazine and started walking back to campus. but then she disappeared. >> phone call came a little bit after midnight, and the voice on the other side of the phone said, do you know where your daughter is? >> 19-year-old trisha lynn riteler was last seen about 8:00 monday night.